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Scott E Page 



Fitting Lines to Data 



R-squared: 

% Variation Explained 



Example scatter plot with 
regression line fitted 





Independent variable (units) 


http://web.anglia.ac.uk 




R-Squared 


% Variation Explained 










Grade 



Variation? 



8 


Shoe 

Size 



Grade 





10 



( 1 , 1 , 2 ) 

( 2 , 5 , 4 ) 

( 4 , 9 , 8 ) 


R-Squared 


11 



* 2 “ (r 2 

^ (2m+b-^) 2 



12 




tk<e*r 



## MODEL 

ai,-s/3) 

( 2 , 5 , 13 / 3 ) 

• 44 , 09 / 3 ) 

1 

R-Squared 



13 


Shoe 

Size 



Grade 








Scott E Page